What does it mean that poetry is beautiful because of emotion and bright because of things?

Poetry is beautiful and delicate because of lyricism, and Fu's works are bright and bright because of the expression of material state. Poetry is beautiful and vivid because of emotion, which comes from Lu Ji's Wen Fu in Wei and Jin Dynasties. In the aspect of poetry creation, Lu Ji emphasized lyricism, which obviously raised the traditional theory of expressing ambition in poetry to the emotional level.